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Warning Signs
Yellow triangle hazard signs to BS EN ISO 7010. Electrical, chemical, slippery surface, traffic, water, and bespoke.
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General Warning Signs
Yellow triangle warning signs covering the full BS EN ISO 7010 pictogram set.
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Workplace Warning Signs
Slippery surface, hot surface, automatic start, low headroom and similar workplace hazards.
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Electrical Warning Signs
Danger of electric shock, high voltage, lightning, and electrical equipment warnings.
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Chemical Warning Signs
Corrosive, toxic, flammable, oxidising, and harmful substance warning signs.
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Traffic Warning Signs
Forklift truck, pedestrian crossing, vehicle movement, and traffic hazard warnings.
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Water Hazard Warning Signs
Deep water, drowning, undertow, and water-related hazard warnings.
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UK warning signs: a complete guide
Yellow triangles are how UK workplaces communicate "be aware". Defined by BS EN ISO 7010, they cover roughly 30 standard hazard pictograms — physical (slippery, hot, sharp), electrical, chemical, biological, radiation, fire-related, and traffic.
When are warning signs legally required?
The Health and Safety (Safety Signs and Signals) Regulations 1996 require employers to display compliant warning signage where a residual risk exists after other controls are in place. Sector-specific rules layer on top: COSHH 2002 for hazardous substances, EAWR 1989 for electrical equipment, the Control of Asbestos Regulations 2012, and CDM 2015 for construction.
The standard warning pictograms
Common UK warning signs:
- Physical: slippery surface, falling objects, low headroom, hot surface, sharp edges, deep water
- Electrical: general electrical hazard, high voltage, lightning
- Chemical: corrosive, toxic, oxidising, harmful, environmental hazard
- Fire-related: flammable material, combustible dust
- Traffic: forklift truck operating, vehicle movement, automatic start
Where to place warning signs
Warning signs go near the hazard, in line of sight before the hazard is reached. Mounting height typically 1.7-2.4m for standard interior placement. For permanent hazards (fixed machinery, high-voltage equipment) the sign is fixed to the equipment or its enclosure.
Common questions
Warning sign FAQs
What is a warning sign?
What colour is a warning sign?
Are warning signs a legal requirement?
What sizes are warning signs available in?
Can I get bespoke warning signs?
What materials are warning signs available in?
Knowledge hub
Safety sign colours explained
Why yellow triangles mean "warning" and how the rest of the BS EN ISO 7010 colour system works.
Read the guide →Bulk order or custom signs?
Trade pricing on 50+ units. Bespoke wording, multi-message boards, branded colours.